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Name the most crucial enzyme found in r...

Name the most crucial enzyme found in root nodules for `N_(2)`- fixation ? Does it require a special pink coloured pigment for its functioning ? Elaborate.

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Nitrogenase is the most crucial enzyme found in the root nodules for `N_(2)`-fixation. It is a Mo - Fe protein that catalyses the conversion of atomospheric nitrogen to ammonia. Pink coloured pigment called leghaemoglobin creates anaerobic conditions for the functioning of nitrogenase enzyme.
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